Question

A player throws a ball upward with an initial speed of 20 m/s. What is the velocity and acceleration at the highest point?

Answer 1

velocity at the highest point =0 m/s
acceleration at the highest point = (-9.8m/s^2)
I hope this helps you

Answer 2

At the highest point, the velocity of the ball is zero and the acceleration of the ball is 9.8 m/s² in the opposite direction.

Given: A player throws a ball upward with an initial speed of 20 m/s.

To Find: The velocity and acceleration at the highest point.

Solution:

• When the ball is thrown upwards with an initial speed, the speed of the body decreases as it moves up and becomes zero at the highest point. So, the maximum height, the velocity of the ball is zero.
• The acceleration acting, whenever an object is thrown in a vertically upward or downward direction, is the acceleration due to gravity.
• However, by convention, irrespective of the direction of the motion of the ball, the acceleration due to gravity always acts in the downward direction towards the center of the Earth.
• So, at the highest position also, the acceleration of the ball is constant at 9.8 m/s² but the direction is opposite. So, we can say that the acceleration of the ball is - 9.8 m/s².

Hence, from the points given above, we can conclude that, at the highest point, the velocity of the ball is zero and the acceleration of the ball is 9.8 m/s² in the opposite direction.

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